When you create a layout, you must select a printing or plotting device in the Page Setup dialog box in order for the layout to be printed or plotted. Once you've selected a device, you can view details about the name and location of the device, and you can change the device's configuration.
The printer or plotter you select in the Page Setup dialog box determines the printable area of the layout. This printable area is indicated by the dashed line in the layout. If you change the paper size or the printing or plotting device, it may change the printable area of your drawing page.
in the Driver and Peripheral Guide